linux-toradex.git/arch/sparc, branch v3.0.63

sparc: huge_ptep_set_* functions need to call set_huge_pte_at()

2013-01-11T17:03:47+00:00

[ Upstream commit 6cb9c3697585c47977c42c5cc1b9fc49247ac530 ]

Modifying the huge pte's requires that all the underlying pte's be
modified.

Version 2: added missing flush_tlb_page()

Signed-off-by: Dave Kleikamp 
Cc: "David S. Miller" 
Cc: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: not any error from do_sigaltstack() should fail rt_sigreturn()

2012-12-03T20:59:14+00:00

commit fae2ae2a900a5c7bb385fe4075f343e7e2d5daa2 upstream.

If a signal handler is executed on altstack and another signal comes,
we will end up with rt_sigreturn() on return from the second handler
getting -EPERM from do_sigaltstack().  It's perfectly OK, since we
are not asking to change the settings; in fact, they couldn't have been
changed during the second handler execution exactly because we'd been
on altstack all along.  64bit sigreturn on sparc treats any error from
do_sigaltstack() as "SIGSEGV now"; we need to switch to the same semantics
we are using on other architectures.

Signed-off-by: Al Viro 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Be less verbose during vmemmap population.

2012-10-28T17:02:13+00:00

[ Upstream commit 2856cc2e4d0852c3ddaae9dcb19cb9396512eb08 ]

On a 2-node machine with 256GB of ram we get 512 lines of
console output, which is just too much.

This mimicks Yinghai Lu's x86 commit c2b91e2eec9678dbda274e906cc32ea8f711da3b
(x86_64/mm: check and print vmemmap allocation continuous) except that
we aren't ever going to get contiguous block pointers in between calls
so just print when the virtual address or node changes.

This decreases the output by an order of 16.

Also demote this to KERN_DEBUG.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: do not clobber personality flags in sys_sparc64_personality()

2012-10-28T17:02:13+00:00

[ Upstream commit a27032eee8cb6e16516f13c8a9752e9d5d4cc430 ]

There are multiple errors in how sys_sparc64_personality() handles
personality flags stored in top three bytes.

- directly comparing current->personality against PER_LINUX32 doesn't work
  in cases when any of the personality flags stored in the top three bytes
  are used.
- directly forcefully setting personality to PER_LINUX32 or PER_LINUX
  discards any flags stored in the top three bytes

Fix the first one by properly using personality() macro to compare only
PER_MASK bytes.
Fix the second one by setting only the bits that should be set, instead of
overwriting the whole value.

Signed-off-by: Jiri Kosina 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Fix bit twiddling in sparc_pmu_enable_event().

2012-10-28T17:02:13+00:00

[ Upstream commit e793d8c6740f8fe704fa216e95685f4d92c4c4b9 ]

There was a serious disconnect in the logic happening in
sparc_pmu_disable_event() vs. sparc_pmu_enable_event().

Event disable is implemented by programming a NOP event into the PCR.

However, event enable was not reversing this operation.  Instead, it
was setting the User/Priv/Hypervisor trace enable bits.

That's not sparc_pmu_enable_event()'s job, that's what
sparc_pmu_enable() and sparc_pmu_disable() do .

The intent of sparc_pmu_enable_event() is clear, since it first clear
out the event type encoding field.  So fix this by OR'ing in the event
encoding rather than the trace enable bits.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Like x86 we should check current->mm during perf backtrace generation.

2012-10-28T17:02:13+00:00

[ Upstream commit 08280e6c4c2e8049ac61d9e8e3536ec1df629c0d ]

If the MM is not active, only report the top-level PC.  Do not try to
access the address space.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: fix ptrace interaction with force_successful_syscall_return()

2012-10-28T17:02:13+00:00

[ Upstream commit 55c2770e413e96871147b9406a9c41fe9bc5209c ]

we want syscall_trace_leave() called on exit from any syscall;
skipping its call in case we'd done force_successful_syscall_return()
is broken...

Signed-off-by: Al Viro 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat

2012-06-01T07:12:54+00:00

commit 45de6767dc51358a188f75dc4ad9dfddb7fb9480 upstream.

Use the 32-bit compat keyctl() syscall wrapper on Sparc64 for Sparc32 binary
compatibility.

Without this, keyctl(KEYCTL_INSTANTIATE_IOV) is liable to malfunction as it
uses an iovec array read from userspace - though the kernel should survive this
as it checks pointers and sizes anyway.

I think all the other keyctl() function should just work, provided (a) the top
32-bits of each 64-bit argument register are cleared prior to invoking the
syscall routine, and the 32-bit address space is right at the 0-end of the
64-bit address space.  Most of the arguments are 32-bit anyway, and so for
those clearing is not required.

Signed-off-by: David Howells 
cc: sparclinux@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman

sparc64: Do not clobber %g2 in xcall_fetch_glob_regs().

2012-05-21T16:40:01+00:00

[ Upstream commit a5a737e090e25981e99d69f01400e3a80356581c ]

%g2 is meant to hold the CPUID number throughout this routine, since
at the very beginning, and at the very end, we use %g2 to calculate
indexes into per-cpu arrays.

However we erroneously clobber it in order to hold the %cwp register
value mid-stream.

Fix this code to use %g3 for the %cwp read and related calulcations
instead.

Reported-by: Meelis Roos 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Fix bootup crash on sun4v.

2012-04-22T23:21:24+00:00

commit 9e0daff30fd7ecf698e5d20b0fa7f851e427cca5 upstream.

The DS driver registers as a subsys_initcall() but this can be too
early, in particular this risks registering before we've had a chance
to allocate and setup module_kset in kernel/params.c which is
performed also as a subsyts_initcall().

Register DS using device_initcall() insteal.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman